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#version 150 core
in vec3 sampleNearLeft;
in vec3 sampleNearRight;
out vec4 fragColor;
uniform sampler2D _qt_texture;
uniform vec4 color;
uniform float alphaMin;
uniform float alphaMax;
void main()
{
vec2 n;
n.x = textureProj(_qt_texture, sampleNearLeft).r;
n.y = textureProj(_qt_texture, sampleNearRight).r;
n = smoothstep(alphaMin, alphaMax, n);
float c = 0.5 * (n.x + n.y);
fragColor = vec4(n.x, c, n.y, c) * color.w;
}
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